“因为工作合同签约时需要学位证”怎么翻译？

It requires the degree certificate and other related documents when signing the contract, so I have to get my degree certificate before Sep. 30.

因为工作合同签约时需要学位证 : Signing the contract because work permits required for degree

因为工作合同签约时需要学位证等相关证明文件，所以我最迟要在9月30号之前拿到学位证

Signing the contract because work needed to graduate certificates and other related documents, so I no later than September 30 to get my degree certificate before